Architecture for middle-sized Rails application

Guten Tag! Are you working on Rails project? Do you have a problem with the architecture? If yes, this article might be helpful to you. As your application getting bigger, your application getting messy and uncontrollable. This kind of problem is a famous problem as "Fat Controller", "Fat Model". You want to solve this problem and want to regain your clean codes. By the way, why this happens? It's

[mr7myself]

Described about the architecture I designed for middle-sized Rails application.